/**
 * 宇宙进化引擎 - Universe Evolution Engine
 * 这是一个能够持续自我进化的宇宙界面系统
 * 核心理念：从"一次构建"到"构建进化引擎"
 */

class UniverseEvolutionEngine {
  constructor() {
    this.version = '1.0.0';
    this.evolutionRules = new Map();
    this.dataSources = new Map();
    this.physicalLaws = new Map();
    this.controlPanel = null;
    this.isEvolving = false;
    this.evolutionHistory = [];
    
    this.init();
  }

  /**
   * 初始化宇宙进化引擎
   */
  init() {
    console.log(`🌌 宇宙进化引擎 v${this.version} 启动中...`);
    
    // 注册基础进化规则
    this.registerEvolutionRules();
    
    // 注册物理定律
    this.registerPhysicalLaws();
    
    // 注册数据源
    this.registerDataSources();
    
    // 创建控制面板
    this.createControlPanel();
    
    // 启动进化循环
    this.startEvolutionLoop();
    
    console.log('✅ 宇宙进化引擎初始化完成');
  }

  /**
   * 注册进化规则
   */
  registerEvolutionRules() {
    // 规则1：星系螺旋演化
    this.evolutionRules.set('galaxy_spiral', {
      name: '星系螺旋演化',
      description: '星系旋臂的螺旋演化规律',
      parameters: {
        rotationSpeed: 0.1,
        spiralTightness: 0.8,
        armCount: 4
      },
      execute: (universe, deltaTime) => {
        // 星系螺旋演化逻辑
        this.evolveGalaxySpiral(universe, deltaTime);
      }
    });

    // 规则2：恒星生命周期
    this.evolutionRules.set('stellar_lifecycle', {
      name: '恒星生命周期',
      description: '恒星的诞生、演化和死亡',
      parameters: {
        birthRate: 0.01,
        deathRate: 0.005,
        evolutionSpeed: 1.0
      },
      execute: (universe, deltaTime) => {
        this.evolveStellarLifecycle(universe, deltaTime);
      }
    });

    // 规则3：黑洞吸积
    this.evolutionRules.set('black_hole_accretion', {
      name: '黑洞吸积',
      description: '黑洞对周围物质的吸积过程',
      parameters: {
        accretionRate: 0.02,
        jetPower: 0.8,
        eventHorizonRadius: 50
      },
      execute: (universe, deltaTime) => {
        this.evolveBlackHoleAccretion(universe, deltaTime);
      }
    });

    // 规则4：星云演化
    this.evolutionRules.set('nebula_evolution', {
      name: '星云演化',
      description: '星云的形成和消散',
      parameters: {
        formationRate: 0.015,
        dissipationRate: 0.008,
        turbulenceLevel: 0.6
      },
      execute: (universe, deltaTime) => {
        this.evolveNebula(universe, deltaTime);
      }
    });
  }

  /**
   * 注册物理定律
   */
  registerPhysicalLaws() {
    // 万有引力定律
    this.physicalLaws.set('gravity', {
      name: '万有引力定律',
      formula: 'F = G * m1 * m2 / r²',
      constant: 6.674e-11,
      execute: (obj1, obj2, distance) => {
        const G = this.physicalLaws.get('gravity').constant;
        const m1 = obj1.mass || 1;
        const m2 = obj2.mass || 1;
        return G * m1 * m2 / (distance * distance);
      }
    });

    // 相对论效应
    this.physicalLaws.set('relativity', {
      name: '相对论效应',
      description: '高速运动下的时空弯曲',
      execute: (object, velocity) => {
        const c = 299792458; // 光速
        const gamma = 1 / Math.sqrt(1 - (velocity * velocity) / (c * c));
        return gamma;
      }
    });

    // 量子涨落
    this.physicalLaws.set('quantum_fluctuation', {
      name: '量子涨落',
      description: '微观尺度的随机波动',
      execute: (position, time) => {
        return Math.sin(time * 0.1 + position.x * 0.01) * 0.1;
      }
    });
  }

  /**
   * 注册数据源
   */
  registerDataSources() {
    // 本地数据源
    this.dataSources.set('local', {
      name: '本地数据',
      type: 'static',
      load: () => this.loadLocalData()
    });

    // API数据源
    this.dataSources.set('api', {
      name: 'API数据',
      type: 'dynamic',
      load: () => this.loadAPIData()
    });

    // 生成数据源
    this.dataSources.set('generated', {
      name: '生成数据',
      type: 'procedural',
      load: () => this.generateProceduralData()
    });
  }

  /**
   * 创建控制面板
   */
  createControlPanel() {
    this.controlPanel = {
      // 进化控制
      evolutionSpeed: 1.0,
      enableEvolution: true,
      selectedRules: ['galaxy_spiral', 'stellar_lifecycle'],
      
      // 物理参数
      gravityConstant: 1.0,
      timeScale: 1.0,
      quantumEffects: true,
      
      // 视觉效果
      showTrails: true,
      showForces: false,
      showEvolutionHistory: true,
      
      // 数据源
      dataSource: 'local',
      autoRefresh: false,
      refreshInterval: 5000
    };
  }

  /**
   * 启动进化循环
   */
  startEvolutionLoop() {
    this.isEvolving = true;
    this.evolutionLoop();
  }

  /**
   * 进化循环
   */
  evolutionLoop() {
    if (!this.isEvolving) return;

    const deltaTime = 0.016; // 60fps
    const universe = this.getCurrentUniverse();

    // 执行所有激活的进化规则
    this.controlPanel.selectedRules.forEach(ruleId => {
      const rule = this.evolutionRules.get(ruleId);
      if (rule) {
        rule.execute(universe, deltaTime);
      }
    });

    // 记录进化历史
    this.recordEvolutionStep(universe);

    // 继续下一帧
    requestAnimationFrame(() => this.evolutionLoop());
  }

  /**
   * 星系螺旋演化
   */
  evolveGalaxySpiral(universe, deltaTime) {
    const rule = this.evolutionRules.get('galaxy_spiral');
    const { rotationSpeed, spiralTightness, armCount } = rule.parameters;

    // 更新星系旋转
    if (universe.galaxy) {
      universe.galaxy.rotation.y += rotationSpeed * deltaTime;
      
      // 更新旋臂
      universe.galaxy.arms.forEach((arm, index) => {
        const angle = (index / armCount) * Math.PI * 2;
        arm.rotation.z = angle + universe.galaxy.rotation.y * spiralTightness;
      });
    }
  }

  /**
   * 恒星生命周期演化
   */
  evolveStellarLifecycle(universe, deltaTime) {
    const rule = this.evolutionRules.get('stellar_lifecycle');
    const { birthRate, deathRate, evolutionSpeed } = rule.parameters;

    // 恒星诞生
    if (Math.random() < birthRate * deltaTime) {
      this.birthStar(universe);
    }

    // 恒星死亡
    universe.stars = universe.stars.filter(star => {
      if (Math.random() < deathRate * deltaTime) {
        this.deathStar(star, universe);
        return false;
      }
      return true;
    });

    // 恒星演化
    universe.stars.forEach(star => {
      this.evolveStar(star, deltaTime * evolutionSpeed);
    });
  }

  /**
   * 黑洞吸积演化
   */
  evolveBlackHoleAccretion(universe, deltaTime) {
    const rule = this.evolutionRules.get('black_hole_accretion');
    const { accretionRate, jetPower, eventHorizonRadius } = rule.parameters;

    if (universe.blackHole) {
      // 吸积盘旋转
      universe.blackHole.accretionDisk.rotation.z += accretionRate * deltaTime;
      
      // 喷流强度
      universe.blackHole.jet.intensity = jetPower * (1 + Math.sin(Date.now() * 0.001));
      
      // 事件视界
      universe.blackHole.eventHorizon.radius = eventHorizonRadius * (1 + Math.sin(Date.now() * 0.002) * 0.1);
    }
  }

  /**
   * 星云演化
   */
  evolveNebula(universe, deltaTime) {
    const rule = this.evolutionRules.get('nebula_evolution');
    const { formationRate, dissipationRate, turbulenceLevel } = rule.parameters;

    // 星云形成
    if (Math.random() < formationRate * deltaTime) {
      this.formNebula(universe);
    }

    // 星云消散
    universe.nebulae = universe.nebulae.filter(nebula => {
      if (Math.random() < dissipationRate * deltaTime) {
        return false;
      }
      return true;
    });

    // 湍流效果
    universe.nebulae.forEach(nebula => {
      nebula.turbulence = turbulenceLevel * Math.sin(Date.now() * 0.001 + nebula.id);
    });
  }

  /**
   * 恒星诞生
   */
  birthStar(universe) {
    const star = {
      id: Date.now(),
      mass: Math.random() * 10 + 0.5,
      temperature: Math.random() * 5000 + 3000,
      age: 0,
      position: {
        x: (Math.random() - 0.5) * 1000,
        y: (Math.random() - 0.5) * 1000,
        z: (Math.random() - 0.5) * 1000
      },
      velocity: {
        x: (Math.random() - 0.5) * 10,
        y: (Math.random() - 0.5) * 10,
        z: (Math.random() - 0.5) * 10
      }
    };

    universe.stars.push(star);
    console.log(`🌟 新恒星诞生: ${star.id}`);
  }

  /**
   * 恒星死亡
   */
  deathStar(star, universe) {
    console.log(`💥 恒星死亡: ${star.id}`);
    
    // 超新星爆发
    if (star.mass > 8) {
      this.supernovaExplosion(star, universe);
    }
  }

  /**
   * 超新星爆发
   */
  supernovaExplosion(star, universe) {
    console.log(`💥 超新星爆发: ${star.id}`);
    
    // 创建超新星残骸
    const remnant = {
      id: Date.now(),
      type: 'neutron_star',
      mass: star.mass * 0.1,
      position: star.position,
      temperature: 1000000
    };

    universe.stars.push(remnant);
  }

  /**
   * 恒星演化
   */
  evolveStar(star, deltaTime) {
    star.age += deltaTime;
    
    // 温度演化
    if (star.mass > 0.5) {
      star.temperature += deltaTime * 0.1;
    }
    
    // 质量损失
    if (star.age > 1000) {
      star.mass -= deltaTime * 0.001;
    }
  }

  /**
   * 星云形成
   */
  formNebula(universe) {
    const nebula = {
      id: Date.now(),
      type: 'emission',
      density: Math.random() * 0.5 + 0.1,
      temperature: Math.random() * 10000 + 5000,
      position: {
        x: (Math.random() - 0.5) * 2000,
        y: (Math.random() - 0.5) * 2000,
        z: (Math.random() - 0.5) * 2000
      },
      size: Math.random() * 200 + 50
    };

    universe.nebulae.push(nebula);
    console.log(`☁️ 新星云形成: ${nebula.id}`);
  }

  /**
   * 记录进化步骤
   */
  recordEvolutionStep(universe) {
    const step = {
      timestamp: Date.now(),
      stars: universe.stars.length,
      nebulae: universe.nebulae.length,
      energy: this.calculateTotalEnergy(universe),
      entropy: this.calculateEntropy(universe)
    };

    this.evolutionHistory.push(step);
    
    // 保持历史记录在合理范围内
    if (this.evolutionHistory.length > 1000) {
      this.evolutionHistory.shift();
    }
  }

  /**
   * 计算总能量
   */
  calculateTotalEnergy(universe) {
    let totalEnergy = 0;
    
    universe.stars.forEach(star => {
      // 动能
      const kinetic = 0.5 * star.mass * (star.velocity.x ** 2 + star.velocity.y ** 2 + star.velocity.z ** 2);
      // 势能
      const potential = star.mass * star.temperature;
      totalEnergy += kinetic + potential;
    });

    return totalEnergy;
  }

  /**
   * 计算熵
   */
  calculateEntropy(universe) {
    // 简化的熵计算
    return Math.log(universe.stars.length + universe.nebulae.length + 1);
  }

  /**
   * 获取当前宇宙状态
   */
  getCurrentUniverse() {
    // 这里应该从实际的宇宙界面获取状态
    // 暂时返回模拟数据
    return {
      galaxy: {
        rotation: { y: 0 },
        arms: []
      },
      stars: [],
      nebulae: [],
      blackHole: {
        accretionDisk: { rotation: { z: 0 } },
        jet: { intensity: 1 },
        eventHorizon: { radius: 50 }
      }
    };
  }

  /**
   * 加载本地数据
   */
  loadLocalData() {
    return {
      stars: [],
      nebulae: [],
      galaxies: []
    };
  }

  /**
   * 加载API数据
   */
  async loadAPIData() {
    try {
      // 这里可以接入真实的宇宙数据API
      const response = await fetch('/api/universe-data');
      return await response.json();
    } catch (error) {
      console.error('API数据加载失败:', error);
      return this.loadLocalData();
    }
  }

  /**
   * 生成程序化数据
   */
  generateProceduralData() {
    const data = {
      stars: [],
      nebulae: [],
      galaxies: []
    };

    // 生成随机恒星
    for (let i = 0; i < 100; i++) {
      data.stars.push({
        id: i,
        mass: Math.random() * 10 + 0.1,
        temperature: Math.random() * 5000 + 3000,
        position: {
          x: (Math.random() - 0.5) * 1000,
          y: (Math.random() - 0.5) * 1000,
          z: (Math.random() - 0.5) * 1000
        }
      });
    }

    return data;
  }

  /**
   * 停止进化
   */
  stopEvolution() {
    this.isEvolving = false;
    console.log('⏸️ 宇宙进化已暂停');
  }

  /**
   * 重置宇宙
   */
  resetUniverse() {
    this.evolutionHistory = [];
    console.log('🔄 宇宙已重置');
  }

  /**
   * 导出进化数据
   */
  exportEvolutionData() {
    return {
      version: this.version,
      history: this.evolutionHistory,
      rules: Array.from(this.evolutionRules.keys()),
      laws: Array.from(this.physicalLaws.keys())
    };
  }
}

// 导出宇宙进化引擎
module.exports = UniverseEvolutionEngine;
